WASHINGTON -- US President Donald Trump said Friday he is "not happy" with the way the US-Iran nuclear talks are going but has not made a final decision on potential military operations against Iran.

"I'm not happy with the fact that they're not willing to give us what we have to have. I'm not thrilled with that. We'll see what happens. We're talking later," Trump told reporters as he left the White House ahead of his trip to Texas.

"We haven't made a final decision" on whether to attack Iran, he said, reiterating that Iran "cannot have nuclear weapons."

"I'd love not to use" the US forces, "but sometimes you have to," Trump said.

Tensions between the United States and Iran are soaring amid a massive US military buildup in the Middle East and the stalled nuclear talks.

Earlier on Friday, the US State Department authorized the departure of non-emergency US government personnel and their families from Israel due to safety risks.